Compilare: main.cpp: In function 'void dfs1(int)': main.cpp:97:33: warning: suggest parentheses around assignment used as truth value [-Wparentheses] while (v = query(1, 0, n)) { ^ main.cpp: In function 'void dfs2(int)': main.cpp:130:33: warning: suggest parentheses around assignment used as truth value [-Wparentheses] while (v = query(1, 0, n)) { ^ main.cpp:120:61: warning: array subscript is above array bounds [-Warray-bounds] int tql = lower_bound(nx + 1, nx + nxl + 1, nx[pos[u].x] - dst) - nx; ~~~~~^ main.cpp:122:62: warning: array subscript is above array bounds [-Warray-bounds] int tqdn = lower_bound(ny + 1, ny + nyl + 1, ny[pos[u].y] - dst) - ny; ~~~~~^